kim kardashian is working out with tracy anderson but has been skewered in the tabloid for gaining weight. >> i feel badly for her. any body who has to do that under pressure of being photographed all the time. sometimes when you're pregnant, last thing you want to do. you want to be in sweats. don't want to leave the house. >> reporter: for real moms they're doing it on their own. >> i wanted to look good after having kids. i wanted to be a good role model for my kids. >> reporter: i'm paula faris in new york. >> i'm just a dude. so, you know, i'm walking on thin ice. seems look a competition. women want to lose the weight so they can hear how amazing they are. >> self-confidence thing too. >> guess you are right. >> most medical experts are saying it is healthy to work out during pregnancy. there goes the excuse you maybe had before to just lounge on the couch and say, i'm eating for two. >> looking good, marci. >> me in the back ground too. >> a little sweaty. >> a good look. >> thank you. >>> women burn calories at the gym with or without makeup. we'll talk about it. >> stay tuned. ..